This Standard specifies the general characteristics, performance and critical dimensions necessary for interchangeability and compatibility with other components, of forged dee and bow shackles in a range of sizes having working load limits from 0.63 to 100 t, and in grades M (4). S (6) and T (8)
In the case of dee shackles for use with forged steel lifting hooks, it may be necessary to use an intermediate component to make the connection